They have written same email to thousands of models, and bloggers like me and you just to get the attention. The way they make money is: they invite you for a shooting, and they will ask you to pay for the wardrobe as a prior payment. But they go ahead only after you agree to pay in advance.
I found exact similar emails were sent to others and has been reported as a scam. The only difference is that, here the famous photographer is Jill Greenberg instead of Annie Leibovitz.